Improvement in stop-valves



S. ,P. M. TASKER.

Improvement in Stop-Valves.

NO.128,922. Patented July 9,1872.

B FICHI WITNESSES j INVENTOR ATE T STEPHEN P. M. TASKER, or PHILADEPHIA, PENNSYLVANIA.

IMPROVEMENT IN STOP-*VALVES.

Specification forming part of Letters Patent No. 128,922, dated July 9, 1872.

impinge as the latter are brought to their open position. The second part of the invention relates to inclined guides in the lower part of the valve-chamber, in the other two diagonal corners, upon which the other opposite edges of the disks bear when the disks are closed upon their seats.

Figure 1 is'a vertical section of the improved valve, the disks E and E being closed I upon their seats a a. Fig. 2 is a like view of the valve-box A taken at right angles to Fig. 1. Fig. 3 is a top view of the box A with the disks E and E, connected therewith, in their closed position. Figs. 4 and dare an inner face view and an edge view of the disk E. Figs. 6 and 7 are like views of the disk E.

Like letters in all the figures indicate the same parts.

A is the valve-box; B the center-piece; G,

.the stuffing-box; and D a, central screw-stem for opening and closing the disks E and E, which are shown in detail in Figs. 4, 5, 6, and 7. The interior view of the valve, in which the operating central screw-stem D is in con- -nection with the disks, is shown in the verticallsection, Fig. 1. As these parts are fully described in my application for Letters Patent filed December 12, 1871, and which is allowed, a further description I deem unnecessary, ex-

cept as to some minor detailsin the construction of the disks, viz.: The spherical inclinese and j, with which the inner faces of the disks are provided, have a lateral sliding motion against each other in the present application, but in the previous application a vertical sliding motion. The disks E and E are connected together at their lower edges by means of the depression 12 and lug c. There are vertical guides d d in the upper part of the valvechamberF, at diagonal corners thereof, against which the opposite edges of the disks E E bear in the opening of the disks; and there are inclined guides d d in the lower part of the chamber,,at the other two diagonal corners, upon which the opposite edges of the disk bear when the disks are brought to their closed position. The said guides at d and d d are represented in Figs. 2 and 3.

Although I prefer the use of spherical inclines for opening and closing the disks E and E, yet I do not confine myself to the use of the same, as other forms of the wedge will act in connection with the guides above described.

I claim as my invention- 1. The combination of the corner-guides d d with the valve-chamber F and disks E and E, the said disks being operated by means of the devices above described, or other suitable mechanism, substantially in the manner and for the purpose above described.

2. The combination of the lower cornerinclined guides d d with the chamber F and disks E E, substantially as and for the purpose set forth.

STEPHEN P. M. TASKER.

Witnesses THOMAS J. BEWLEY, STEPHEN UsTIcK.

PIoE. 

